Improvement in spark-arresters for locomotives



R. D. GRANT.

Spark-Arrester for Locomdtives.

No. 133,981. v Patented Dec.17,1872.

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' conical flange on the tubejoint above the ex- YIYUNITED STATES PATEN OFFICE.

ROSWELL n. GRANT, or BEARDSTOWN, ILLINOIS:

IMPROVEMENT IN SPARK-ARRESTE-RS FOR LOCOMOTIVES.

Specification forming part of Letters Patent No. 133,981, dated December 17, 1872.

To all whom it may concern:

Be it known that I, RoswELL D. GRANT, of Beardstown, in the county of Cass and State of Illinois, have invented a new and useful Improvement in Spark-Arresters, of which the following is a specification:

This invention relates to a mode of arresting sparks from locomotive and other steam boiler chimneys; and consists in a perforated or wire-gauze tube at the bottom of the smokestack, within the smoke-box, and in a conical flange around the tube, and in a slip -joint at the top thereof, and connected with the exy h'aust-tubes at the bottom the construction and arrangement being as hereinafter described.

The accompanying drawing illustrates my invention.

Similar letters of reference indicate corresponding parts.

A is the smoke-box. B is the tube-sheet of O is the chimney. D is a tube which is perforated and extends-from the base of the chimney to near the bottom of the smokebox, where it receives the exhaust-tubes from E E are the exhausts. F is a ,hausts. G is the collar on the smoke-tube D.

1 H is a short section of the tube, which is in- 'terposed between the tube D and the chimney, Y which may be raised or lowered to equalize the draft through boiler-tubes and prevent the lodgment of dead sparks or cinders around the top of the tube.

By the interposition of the perforated tube D, or its equivalent in the smoke-box, wirenetting on the chimney for arresting sparks may be omitted.

It is a perfect spark-arrester, while it allows 3f a free exhaust and discharge of smoke and ust.

The lower end of the tube D is. closed, with the exception of apertures for the exhaustpipes E E. The conical flange or collar F conducts the cinders which may collect, away from the exhaust-pipes, and may be made of any desired diameter.

Instead of a tube of perforated metal, a wire gauze tube may be arranged to receive the exhaust. 4

The conical flange F, as well as the section H, may be omitted, and still the essential features of my invention would be retained.

Having thus described my invention, I claim as new and desire to secure by Letters Bat enthaust-pipes E E, perforated pipe D, smokebox A, and chimney 0, arranged as and for the purpose described.

.ROSVVELL D. GRANT.

Witnesses WILLIAM WAsHnunN, THEODORE A. HoFFMANN.

The adjustable shield H, combined with ex- 

